AMD has reportedly pushed the launch of mid-tier models from its AMD 800-series chipset to early 2025, reports ComputerBase.de. With the Ryzen 9000-series "Zen 5" processors already launched earlier this month, and compatible with existing AMD 600-series chipset motherboards with a BIOS update, motherboard vendors are leisurely announcing their motherboards based on the AMD X870E and AMD X870 chipsets. Motherboards based on both offer drop-in compatibility with Ryzen 9000-series processors, and introduce new connectivity features such as 40 Gbps USB4 and Wi-Fi 7.

The company probably wants the two to have some time in the Sun before they're joined by the more affordable B850, which gamers could be drawn to. The AMD B850 has mostly identical platform I/O to the AMD X870, except Gen 5 support for the PCI-Express x16 slot is optional (motherboard vendors can choose to wire this out as Gen 4). The 40 Gbps USB4 is also optional here. You still get CPU overclocking support. The B840 is an entry-level chipset that's being launched to probably phase out the A620 and A620A, since it features similar I/O features to the A620A, but will probably come with drop-in compatibility for 65 W Socket AM5 processors. A deferred launch of the mid-tier chipset isn't too off character for AMD. It launched its popular B450 and B550 chipsets several months after the X470 and X570, respectively.

BIOSTAR, a leading manufacturer of motherboards, graphics cards, IPC solutions, and storage devices, today is excited to announce a brand-new BIOS update for its AMD AM5 motherboards, designed to support AMD's latest Ryzen 9000 series processors, including Ryzen 9 9950X, Ryzen 9 9900X, Ryzen 7 9700X, and Ryzen 5 9600X. Incorporating the latest AMD AGESA 1.2.0.0.a Patch A BIOS update on BIOSTAR official website, BIOSTAR AM5 series motherboards consisting of X870E, X670E, B650E, B650, A620, and A620A are now primed and ready to unleash the full potential of AMD's ZEN 5 processors with superior stability.

AMD's latest Ryzen 9000 series processors, built on the groundbreaking Zen 5 architecture, represent a significant leap forward in computing performance and efficiency. These processors offer up to 16 cores and 32 threads, with clock speeds reaching up to 5.7 GHz. Featuring enhanced IPC (Instructions Per Cycle) performance and advanced Ryzen AI capabilities, the Ryzen 9000 series is engineered to handle intensive gaming, content creation, and professional workloads with ease. The new architecture also introduces improved power efficiency, ensuring cooler operation and lower energy consumption. With these cutting-edge processors, users can experience unprecedented levels of speed, responsiveness, and overall computing power.

BIOSTAR introduced the A620MH Aurora, a Socket AM5 Micro-ATX motherboard based on the AMD A620A chipset. In case you're wondering, the A620A is a revision of the A620 that's based on the same physical chip as the ASMedia Promontory driving AMD B550 chipset, according to this user on the AnandTech forums. First party documentation from AMD is sparse. The A620 (without the "A" suffix) is based on the newer Promontory 21 silicon, and is essentially a B650 with a few features disabled. The A620A, on the other hand, is practically a B550 on the Socket AM5 platform. Why this matters is that the chipset bus for the A620A (aka B550) is PCI-Express 3.0 x4; whereas the A620 uses PCI-Express 4.0 x4. The A620A appears to have the same downstream connectivity as the A620, and since even the A620 has PCIe Gen 3 for its chipset-attached M.2 NVMe slot(s), for the most part the performance difference will be negligible, unless there are other bandwidth-hungry devices connected to the chipset. On both the A620 and A620A, motherboard designers are allowed to wire out one CPU-attached M.2 NVMe slot capped at PCI-Express 4.0 x4.

The A620MH Aurora from BIOSTAR clearly mentions the A620A chipset on the box, and so you're making an informed buying decision. The board is built in the Micro-ATX form-factor, and draws power from a combination of 24-pin ATX and 8-pin EPS power connectors. You can only install Ryzen 7000 and 8000G series processors that have a TDP of 65 W. The processor is wired to two DDR5 DIMM slots for a maximum of 96 GB of memory capacity; one M.2 NVMe slot with PCI-Express 4.0 x4 wiring; and a PCI-Express 4.0 x16 slot. There are two PCI-Express 3.0 x1 slots from the A620A FCH. Storage connectivity besides the M.2 Gen 4 slot includes four SATA 6 Gbps ports. USB connectivity includes six USB 3.2 Gen 1 (including two from a header), and a handful of USB 2.0 ports.